What network is Propy on?

Could you please elaborate on the underlying network that Propy utilizes? As a cryptocurrency and finance professional, I'm curious to understand the technological backbone that supports this platform. Is it built on a mainstream blockchain like Ethereum or Bitcoin? Or perhaps it's a lesser-known network with specific advantages for the real estate and property industry? Clarifying this information would help me assess the potential scalability, security, and overall viability of Propy's operations. Thank you for your insight into this matter.